Name the device which converts: chemical into light

A truck accelerates uniformly from rest to 17.5 m/s in 6.1 s along a level stretch of road. Determine the average power (in W) required to accelerate the truck for the following values of the weight (ignore friction).

The leader of a bicycle race is traveling with a constant velocity of 11.9 m/s and is 10.6 m ahead of the second-place cyclist. The second-place cyclist has a velocity of 9.80 m/s and an acceleration of 1.20 m/s2.

A ball is thrown straight up from the ground with an initial velocity of 33.8 m/s; at the same instant, a ball is dropped from the roof of a building 26.3 m high.

The electrons of an atom are located in regions around the nucleus called?

A cat starded at a distance of 5.4 m from your front door and began walking directly away from it. 2 minutes later, the cat was 9.3 m from your door if d is distance of the cat from the door what is d

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?

What happens to a light ray passing through the center of a lens?

A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.870 m/s at an angle of 35.0° above the table, and it lands on the magazine 0.0770s after leaving the table. Ignore air resistance.

A force of 5 N accelerates an object. The object's mass is 50 g. What is the acceleration of the object? (Formula: F=ma)

Which is a legacy of the enlightenment?